Improved SAPO-34 Membranes for CO2/CH4 Separations


  • We gratefully acknowledge support by Shell Global Solutions. We thank Dr. E. S. Sanders of NATCO Group CYNARA Membrane Systems for providing reference [1].


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A SAPO-34 membrane, prepared by seeding SAPO crystals, has a CO2/CH4 separation selectively of 115 and a CO2 permeance of 4.0 × 10-7 mol m–2 s–1 Pa–1. SAPO-34 membranes separate CO2/CH4 mixtures at a feed pressure of 7 MPa.